Answer this question truthfully
### Question: What causes Hallucination?
### Response: There are many causes of hallucinations, including:
Being drunk or high, or coming down from such drugs as marijuana, LSD, cocaine (including crack), PCP, amphetamines, heroin, ketamine, and alcohol. Delirium or dementia (visual hallucinations are most common) Epilepsy that involves a part of the brain called the temporal lobe (odor hallucinations are most common) Fever, especially in children and the elderly Narcolepsy Psychiatric disorders, such as schizophrenia and psychotic depression Sensory problem, such as blindness or deafness Severe illness, including liver failure, kidney failure, AIDS, and brain cancer